Răspuns :
le calculam:
2x16=32
15x4=60
3x9=27
84x2=168
acum facem o egalitate:
32+60+a=27+168
92+a=195
a=195-92
a=103
2x16=32
15x4=60
3x9=27
84x2=168
acum facem o egalitate:
32+60+a=27+168
92+a=195
a=195-92
a=103